KR101677927B1 - Solar cell array having a snow removal - Google Patents

Abstract

The present invention relates to a solar cell array having a function of removing accumulated snow, capable of improving efficiency of solar generation by effectively removing the accumulated snow by moving a blade along the solar cell array when the snow is detected to be accumulated. In order to solve the above described problems, the solar cell array having the function of removing the accumulated snow comprises: an accumulated snow detecting device detecting a state of the accumulated snow; and an accumulated snow removing device which operates based on accumulated snow information detected by the accumulated snow detecting device. The accumulated snow removing device allows a sliding frame to move when the accumulated snow information detected by the accumulated snow detecting device is determined as snow is accumulated, and then the accumulated snow is removed on the solar cell array by the movement of the sliding frame.

Description

SOLAR CELL ARRAY HAVING A SNOW REMOVAL WITH SNOW REMOVAL FUNCTION

The present invention relates to a solar cell array having a snow removing function, and more particularly, to a solar cell array having a snow removing function capable of effectively removing snow by moving a blade along a solar cell array when snowfall is sensed, To a solar cell array.

A photovoltaic power generation system converts light energy into electric energy. The solar power generation system includes a solar panel (module) that converts light energy into electric energy, and an inverter that converts the DC power generated by the solar panel into AC power.

The structure of the photovoltaic power generation system will be described in more detail. The photovoltaic power generation system includes a photovoltaic module for supplying a direct current power corresponding to received sunlight, a solar cell array connected in series with the solar cell module, A photovoltaic connection panel that facilitates wiring and performs various protection functions, an inverter that converts DC power generated from the solar cell array to AC power, and a load that consumes the generated power.

The photovoltaic connection panel is configured to minimize a failure range when a failure occurs in the solar cell array to prevent an accident, and to find a high advantage. In addition, according to array configuration and capacity, it is possible to connect parallel array of appropriate arrays, connect array cables to inverters, and arrange connection of many solar array easily. do. Such a connection section includes a DC output switch, a lightning prevention element, a reverse current prevention element, a terminal block, and a fuse (or a switch), and an output terminal switch for measuring insulation resistance or checking a short circuit current periodically is also provided.

Particularly, the photovoltaic module of the photovoltaic power generation system prevents the circuit from being damaged by an unexpected sudden voltage or current, which is caused by an electric shock, and prevents the imbalance of the power generation characteristics of the condenser due to other factors such as the environmental change Various protection devices are provided. The protection device includes reverse voltage prevention means including a reverse voltage prevention diode for protecting a circuit at an input / output terminal by interrupting a current flowing in a reverse direction, and a control unit for detecting a power voltage and a current generated through the solar panel, A voltage and current measurement sensor for monitoring whether the overcurrent is cut off, and an overcurrent protection fuse for protecting the circuit by cutting off the overcurrent.

On the other hand, if snow accumulates on the solar cell array, it becomes impossible to perform solar power generation.

As a construction for removing snow from a solar cell array, a snow removing apparatus for a solar cell is disclosed in Korean Utility Model Publication No. 20-1999-000402.

The above technique is characterized by comprising a holding plate rotatably installed in front of the frame and a holding plate vibrating unit for removing snow from the solar cell by a vibration generated by elastically rotating the holding plate.

In other words, the above-described technology has a structure for removing accumulated snow by rotating the solar cell array. As the size of the solar cell array is increased, the configuration required for constructing the solar cell array becomes larger, Disadvantages arise.

As a technique for partially solving the above problems, a snow removing apparatus for a solar cell module is disclosed in Korean Utility Model Publication No. 20-1999-0019712.

In the above technology, a hot line is appropriately arranged between each cell and a cell of the solar cell module, and the hot line is automatically or manually operated when the snow comes, by controlling the operation of the hot line by manual operation and automatic operation by a sensor And snow that is snowing on the solar cell module is melted and removed.

However, it is difficult to arrange the heat ray in the solar cell module (solar cell array), the snow can not be removed when the arranged heat ray is broken, and the problem that the performance of the solar cell array can be weakened by the heat ray Lt; / RTI >

KR 20-1999-0000402 U (1999. 01. 15.) KR 20-1999-0019712 U (June 15, 1999)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a sliding frame which is moved along the solar cell array, And to provide a solar cell array having a snow removing function capable of quickly removing snow.

According to an aspect of the present invention, there is provided a solar cell array having a snow removing function, the snow detecting apparatus comprising: a snow detecting device for detecting a snowing state; And a snow removal device operated on the basis of the snow information detected by the snow detection device. The snow removal device moves the sliding frame when the snow information detected by the snow detection device is determined as snow, And removing snow from the solar cell array by movement of the sliding frame.

Here, the snow removing apparatus includes rails installed on both sides of the solar cell array; A sliding frame movably installed on the rail; A ball screw installed on the sliding frame in a sliding direction; A nut housing installed in the sliding frame and inserted into the ball screw; And a motor for rotating the ball screw.

In this case, the sliding frame is symmetrical with respect to the nut housing, and is folded in the sliding direction.

Further, the snowfall detection apparatus may further include a temperature sensor; And an infrared sensor that detects a snow condition based on the temperature detected by the temperature sensor.

Here, the infrared sensor may include an infrared transmission module installed at an upper end of the vertical frame and transmitting infrared rays; And an infrared ray receiving module for receiving infrared rays transmitted from the transmitting module, wherein the infrared ray transmitting module and the infrared ray receiving module have a predetermined angle of inclination.

According to the present invention, there is an advantage that the efficiency of solar power generation can be increased by rapidly removing snowfall by moving a sliding frame according to snowfall detection.

Also, the snow removal system according to the present invention can be installed in a range that does not change the structure of the solar cell array, so that it can be applied to an existing solar cell array, and is easy to maintain and repair.

1 is a schematic view of a solar power generation system to which a solar cell array having a snow removing function according to the present invention is applied.
2 is a perspective view of a solar cell array having a snow removing function according to the present invention.
3 is a side view of a solar cell array having a snow removing function according to the present invention.
4 is a schematic block diagram of a snow detection apparatus applied to a solar cell array having a snow removal function according to the present invention.
5 is an exploded perspective view of a sliding frame applied to a solar cell array having a snow removing function according to the present invention.
6 is a sectional view taken along the line A-A 'in a state in which the sliding frame of FIG. 5 is assembled;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a solar cell array having a snow removing function capable of improving efficiency of solar power generation by effectively removing snowfall by moving a sliding frame along a solar cell array when snowfall is sensed.

FIG. 1 is a schematic view of a solar power generation system to which a solar cell array having a snow removing function according to the present invention is applied.

1, the solar power generation system includes a solar cell array 1, a solar light connecting panel 2, an inverter 3, a water tank 4, and a load.

The solar cell array 1 is for generating electricity by collecting sunlight incident from the outside, and silicon and a composite material are usually used mainly. Specifically, the solar cell array 1 uses a p-type semiconductor and an n-type semiconductor bonded together, and utilizes a photoelectric effect to generate electricity by receiving sunlight.

Most of the solar cell arrays 1 are formed of large-area P-N junction diodes, and the electromotive force generated at the opposite ends of the P-N junction diode is connected to an external circuit. The minimum unit of the solar cell array 1 is referred to as a cell. Actually, a plurality of solar cell cells are used. In other words, since the required voltage used in the home is several tens to several hundreds of volts or more, the voltage from one cell is very small, about 0.5 V, so that a plurality of unit solar cells can be connected in series or parallel . In addition, when the solar cell array 1 is used outdoors, it is exposed to various harsh environments. Therefore, a plurality of cells are used as a package in order to protect a plurality of cells connected with a necessary unit capacity in a harsh environment.

The photovoltaic panel 2 collects the direct current produced from the solar cell array 7 and outputs it to the inverter 3. The photovoltaic panel 2 receives the direct current power generated from the solar cell array 1, (Not shown) composed of a switch for a switch, an output terminal or a molded case circuit breaker (MCCB), a bus bar or a terminal block, and a magnetic switch, a diode and a power fuse, a lightning protection element (SPD, ZNR) ). In addition, the photovoltaic connection panel 2 may be provided with an output terminal switch for insulation resistance measurement or periodic short-circuit current confirmation.

On the other hand, the photovoltaic connection panel 2 is normally supplied with a magnetic switch of the main circuit device, and the magnetic switch of the spare circuit device is opened, and DC power is supplied through the diode of the main circuit device and the fuse for power do. At this time, if an abnormality occurs in the solar cell module, the magnetic switch of the main circuit device in which the abnormality occurs in the field is opened, the magnetic switch of the spare circuit device is immediately turned on, This allows the continuous development through the fuse.

The inverter 3 integrates the DC power received from the solar cell array 1 into one DC power and converts it into AC power for use as commercial power. The AC power output from the inverter (3) is supplied to the load of the customer through the water tank (4).

Next, a solar cell array having a snow removing function according to the present invention will be described.

FIG. 2 is a perspective view of a solar cell array having a snow removing function according to the present invention, and FIG. 3 is a side view of a solar cell array having a snow removing function according to the present invention.

2 and 3, a solar cell array having a snow removing function according to the present invention mainly includes a snow detection apparatus 100 for detecting snowfall and a snow removal apparatus 200 for removing snowfall .

The snowfall detection apparatus 100 performs a function of detecting the snow state accumulated in the solar cell array 1, that is, snowfall. FIG. 4 is a graph showing snowfall applied to a solar cell array having a snow removal function according to the present invention Fig. 2 is a schematic block diagram of a detection device.

Referring to FIG. 4, the snow depth detection apparatus 100 may include a temperature sensor 110, an infrared sensor 120, and a weight sensor 130.

The temperature sensor 110 detects the temperature of the periphery where the solar cell array 1 is installed, and can be detected using the relationship between temperature and resistance. The temperature sensor 110 may be classified into a NTC (Negative Thermal Coefficient) method and a PTC (Positive Threshold Coefficient) method. The NTC method uses a principle that the resistance decreases when the temperature rises. It is a method using the principle that the resistance increases as the temperature increases.

The infrared sensor 120 detects the snowing state and includes an infrared ray transmitting module 121 and an infrared ray receiving module 122.

The infrared transmitting module 121 emits infrared rays and the infrared ray receiving module 122 receives infrared rays transmitted from the infrared ray transmitting module 121.

At this time, snow is accumulated between the infrared transmission module 121 and the infrared reception module 122. Preferably, on the upper side of the solar cell array 1. The infrared rays transmitted from the infrared ray transmitting module 121 are not received by the infrared ray receiving module 122 and the infrared rays transmitted from the infrared ray receiving module 122 are not received by the infrared ray receiving module 122. Therefore, It can be determined that the vehicle is not received by the driver 122 in the snow condition.

Here, the infrared sensor 120 may be configured not to operate at all times but to operate based on the temperature detected by the temperature sensor 110. For example, when the set temperature is compared with the temperature detected by the temperature sensor 110, the infrared sensor 120 is operated only when the temperature detected by the temperature sensor 110 is relatively lower than the set temperature . At this time, the set temperature may be set to about 5 to 8 占 폚 because the temperature may rise when the snow falls.

Also, the infrared transmitting module 121 and the infrared receiving module 122 may be operated with a time interval.

The infrared ray sensor 120 is installed on the plate 123 and the infrared ray transmitting module 121 is installed on the upper end of the vertical frame 124. The infrared ray receiving module 122 is mounted on the plate 123 And can be configured to detect snowfall.

However, since the snow (snow) falling by the vertical frame 124 provided with the infrared transmission module 121 may not be snowed on the infrared reception module 122, the infrared transmission module 121 and the infrared reception module The movable member 122 may be configured to have a predetermined inclination angle.

That is, the infrared ray receiving module 122 may be disposed at a position spaced apart from the infrared ray transmitting module 121 so as to be able to accurately detect snowfall.

The weight sensor 130 detects an increased weight and may include a bowl in which snow falls and a load-cell installed in a lower portion of the pole.

At this time, the weight sensor 130 may be configured to operate based on the temperature detected by the temperature sensor 110.

In addition, the Paul may be provided with a discharge hole through which rainwater is discharged due to rainfall or snowfall.

Next, the snow removing apparatus 200 will be described.

The snow removal apparatus 200 is operated based on the snowfall information detected by the snowfall detection apparatus 100. When the snowfall information detected by the snowfall detection apparatus 100 is determined as snowfall, the snowfall removal apparatus 200 moves the sliding frame , And removing the snow on the solar cell array by the movement of the sliding frame.

The structure of the snow removing apparatus 200 will be described with reference to FIGS. 2 to 3 of the accompanying drawings.

The snow removing apparatus 200 includes a rail 210 installed on both sides of the solar cell array 10, a sliding frame 220 movably installed on the rail 210, A nut housing 240 installed in the sliding frame 220 and inserted into the ball screw 230 and a motor 250 rotating the ball screw 230. The ball screw 230 is installed in the sliding frame 220, .

In order to transmit the rotational force of the motor 250 to the ball screw 230, a driving gear is installed on the rotating shaft of the motor 250 And a driven gear that rotates in engagement with the driving gear may be installed in the ball screw 230. In addition, the drive gear may be configured to have a gear ratio relatively lower than the driven gear in order to increase the torque in the rotation transmission mode by the drive gear and the driven gear.

The present invention further includes a limit switch for limiting a sliding range of the sliding frame 220 that is moved in accordance with the driving of the motor 250.

In this configuration, the sliding frame 220 removes snow from the solar cell array 1 while moving along the solar cell array 1 in accordance with driving of the motor 250.

5 is an exploded perspective view of a sliding frame applied to a solar cell array having a snow removing function according to the present invention.

5, the sliding frame 220 includes a slide bar 221 having the nut housing 240 at its center, a rotation preventing stopper 222 coupled to the slide bar 221, A slide arm 223 hinged to the rotation stopper 222 and a blade 224 coupled to the lower portion of the slide arm 223. [

Each of the slide bars 221 has a rail through hole 221a through which the rail 210 passes.

6 is a cross-sectional view taken along the line A-A 'in a state where the sliding frame of FIG. 5 is assembled.

Referring to FIG. 6, the slide arm 223 is hinged to the rotation stopper 222 so as to be rotatable at a predetermined angle.

A blade 224 contacting the surface of the solar cell array 1 is provided below the slide arm 223. The blade 224 contacts the surface of the solar cell array 1 It can be made of a flexible rubber material in order to prevent the occurrence of scratches.

The slide bar 221 is moved downward and upward along the surface of the solar cell array 1 by driving of the motor 250. At this time, the slide bar 221 is guided by the rail 210 and descends along the surface of the solar cell array 1. In this process, the slide arm 223 is rotated by the rotation prevention stopper 222 The direction of rotation is limited and the solar cell array 1 is vertically lowered. The rotation direction of the slide arm 223 is not restricted by the rotation stopper 222 in the traveling direction in the process of ascending the slide bar 221, As shown in Fig.

In this configuration, the slide bar 221 is provided with a nut housing 240 for converting rotational motion of the ball screw 230 into linear motion, and linear motion energy converted from the nut housing 240 is transmitted to the slide bar 221. [ (221). The slide bar 221 is horizontally symmetrical with respect to the nut housing 240 in order to uniformly transmit the linear kinetic energy converted from the nut housing 240 to the left and right sides of the slide bar 221 But may be formed in a shape bent in the sliding direction.

When the snowfall information detected by the snowfall detection apparatus 100 is determined as snowfall, the snow removing apparatus 200 descends the slide frame 220 by the motor 250, . The slide arm 223 of the slide frame 220 is restrained from being rotated by the rotation preventive stopper 222 and descends in a vertical state with respect to the solar cell array 1, .

When the slide frame 220 reaches the lowest point, the snow removing apparatus 200 drives the motor 250 to raise the slide frame 220 to return the slide frame 220 to the initial position .

According to the present invention, snowfall can be quickly removed by moving the sliding frame in accordance with snowfall detection to increase the efficiency of solar power generation, and it can be installed within a range that does not change the structure of the solar cell array. It can be applied to arrays, and it is easy to maintain and repair.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Photovoltaic array 2: Photovoltaic module
3: Inverter 4: Water front
100: snow detection device 110: temperature sensor
120: Infrared sensor 121: Infrared transmission module
122: Infrared receiving module 123: Plate
124: vertical frame 130: weight sensor
200: snow removal device 210: rail
220: Sliding frame 221: Slide bar
221a: Rail through hole 222: Anti-rotation stopper
223: slide arm 224: blade
230: ball screw 240: nut housing
250: motor

Claims (5)

In a solar cell array of a solar power generation system,
A snowfall detection device for detecting a snowfall state; And
A snow removing apparatus operated on the basis of the snow information detected by the snow detection apparatus;
And,
The snow removing apparatus includes:
The sliding frame is moved when the snowfall information detected by the snowfall detection device is determined as snowfall, the snowfall is removed from the solar cell array by the movement of the sliding frame,
The snow removing apparatus includes:
A rail installed on both sides of the solar cell array;
A sliding frame movably installed on the rail;
A ball screw installed on the sliding frame in a sliding direction;
A nut housing installed in the sliding frame and inserted into the ball screw; And
A motor for rotating the ball screw;
And,
The sliding frame includes:
Wherein the nut housing is symmetrical with respect to the nut housing and is bent in a sliding direction,
The sliding frame includes:
A slide bar having the nut housing at its center, a rotation prevention stopper coupled to the slide bar, a slide arm hinged to the rotation prevention stopper, the slide arm being hindered by the rotation prevention stopper when the slide housing is lowered, And a blade connected to the surface of the solar cell array and contacting the surface of the solar cell array.
delete delete The method according to claim 1,
The snowfall detection device includes:
A temperature sensor for detecting the temperature around the solar cell array;
An infrared ray sensor for detecting a snowfall state based on the temperature detected by the temperature sensor; And
A weight sensor for detecting an increased weight;
, ≪ / RTI >
Wherein the weight sensor includes a pole for snowfall and a load cell installed at a lower portion of the pole.
The method of claim 4,
The infrared sensor includes:
An infrared transmission module installed at an upper end of the vertical frame and transmitting infrared rays; And
An infrared ray receiving module for receiving infrared rays transmitted from the transmitting module;
And,
Wherein the infrared transmitting module and the infrared receiving module are configured to have a predetermined inclination angle so that the infrared receiving module can be disposed at a position spaced apart from the infrared transmitting module to detect snowing. A solar cell array having a removal function.

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